Centrifugal air-pump.



G. PAGBL.

OENTRIFUGAL AIR PUMP. APPLIoATm'N FILED MAY 1o, 1911.

LBQQG- Patented Mar. 10, i914,

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rin) smarts Parrain: OFFICE.

GUs'rAv PAGEL, or CHARLOTTENBURG,GERMANY, AssIGNoR To GENERAL ELECTRICCOMPANY, a eoaromrroivor New YORK.

CENTRIFUGAL AIR-PUMP.

lessees.

Apparatus for removing vaporsv and un- 'condensed gases from condensersmust, if

the vacuum in the condenser is to be kept Iconstantly as high aspossible, be regulable within rather wide limits since it often happensthat the steam engines. or turbines with which the condenser is used are'sub,

jected to relatively great changes in operating conditions. Inreciprocatmgor piston air pumps the necessary regulation can be-obtained by varying the number of' strokes or revolutions but theregulation of throwingwater air pumps, by a change of the speed ofrotation is often-not applicable or not suflicient7 and the object ofthe present invention is the provision o f means for effectivelyregulating such .pumps by reducing the supply of throwing-water withoutimpairing the eiiiciency of the pump due to the throttling ofthe supplyandthe con; sequent loss of head which is objectionable .in all caseswhere complete .utilization of this head is essential to the efficientoperation of the pump. A Said loss is`obviated by the. invention andalthough the quantity of the throwing medium is varied, the head of 1the latter existing atany timeremains unchanged. This result is obtainedby arranging an adjustable regulating member just inv advance of, or atonly a small distance from a place where the pressure or Velocity 4ofthe auxiliary medium undergoes a change due tothe action 'of any means.If the regulating member in the form of a valve,

it may also serve as a supplyingdevce for the auxiliary mcdium,'thusavoidlng impact and eddies when the position of'said mem- In theaccompanying draWing'Figure l shows an illustrative construction orembodiment of the invention in a rotary airsuction device working withan auxiliary or. throwing liquid medium, preferably water and Fig. 2Y isa cross sec-tion of the lower portion thereof. y

The invention consists of -a positively driven impeller'lwlieel 1mounted on a suitable shaft and a directing ring or member 2specification of Let ers raient.

Patented Mar. 10, 1914-.

Application filed May 10, 1911. Serial No. 626,240.

surrounding the impeller. The throwing- 'water or other auxiliary mediumpasses through the' pipe 3 into lthe impeller l and by reason of thevelocity imparted to it by the impeller and itssubdivision into sepa-4rate water-pistons in passing fromthc impeller to the directing ring 2,it draws into the gra-p4 the gases or Yapors that enter the pump throughthe vopening 5. The water'- pistons force the air, gses 'andj'vaporoutwardly through the pas'sages'pfthe directing member into the chamber6t'he air etc., passing olf through the conduit Z and the water throughthe conduit 8.

.The quantity of throwing-water for a givennumber of revolutions of thepump is' regulated by an annular slide valve 9 surrounding the shaftandmovable longitudinally thereof, which 'also serves as a guide or meansfor. directing the throwing-water to theinletsvof the passages in theimpeller. The valve can be shifted directly-in front 'of said linletsand parallel to the surfaces con- When the regulating device 9 isshifted by means of the lever 10 and the hand Wheel 1 1, no throttlingoccurs but only a reduction of` the quantity of throvving-water whichflows into the impeller l so that notwithstandinr this regulation themaximum pressure differencewhich exists between the entrance and exitopenings of the mpeller can always be completely utilized, a featurewhich is of great importance to the eflicient operation of the pump.ThisV regulation may, of course, be employed with otherrotary or fixedair-suction devices and may 1n some cases be only partial. The shiftingof the regulating member may be accomplished automatically instead of byhand, as, for example, by connection with a suitable regulator.

vIn accordance with the provisions of the patent statutes, I havedescribedtlie principle of operation of my invention, together with theapparatus which I now consider to represent the'best embodiment thereof;but I desire to have it understood that the apparatus shown is onlyillustrative, and that the' invention can be carried out by other means.

What I claim as new and desire to secure by LettersPatentuof the UnitedStates, is,-

-.1-I The method of regulating an apparatus utilizing an auxiliaryliquid medium for nnecting the bases of the impeller vanes. l

.drawing ofi gases, vapors, and the like by direct action of said mediumthereon, which i consists in varying the quantity of the auxiliarymedium Toy-means of a regulating member that is caused to act on saidmedium directly in advance of or at a small distance from a place wherethe pressure or velocity ofthe auxiliary medium undergoes a change,

2. In an apparatus utilizin an auxiliary liquid medium Jfor drawing oftgases, vapor,

nfl the like by direct action of said medium thercomthe combination ofmeans for changthe pressure or velocity of the auxiliary medium as itpasses through said apparatus, and a device located at a'point closelyad- .;a 'ent the place where said means produces L said change whichvaries the quantity of the la' medium to regulate the operation of theapparatus.

3. In centrifugal air pump, the combination of an inipeller havingpassages for a throwing medium, means for supplying the throwing mcdiinnto the impeller including a. reguitting member adjacent to the inlets ofsaid passages which varies the quantity of throwing medium supplied tothe impelier, means conveying air, to the pump, and a directing membersurrounding the impeller through which the throwing medium and the airpass.

fi, In a centrifugal air pump, the combination of an impeller havingpassages for tigiroiving-ivater, means for supplying throwing-Water tothe impeller including avalve .having passages to direct the throwingterto the iniets of said impeller passages, mechanism for adjusting thevalve to vary the quantity of Water delivered to said inlets, and adirecting member surrounding the impeller through which the throwing-Water and air pass. i

5. In a. centrifugal' air pump, the combination of an impeller havingpassages for throwing-water, a shaft on which the impeller is mounted,means for supplying throwing-Water to the impeller including a valveLosa surrounding the shaft and movable longitudinally thereof, mechanismfor adjusting the valve to vary the quantity of throwingivater deliveredto the impeller, and a directing member surrounding the impeller throughwhich thevthrowing-vvater'and air pass.

6. In a centrifugal air pump, the combination of an impeller havingpassages for throwing-Water, a shaft on Which the impeller is mounted, avalve for regulating the supply of throwing-Water Wnich surrounds theshaft and is movable longitudinally thereof, said valve being providedWith passages 'ivhich direct the throwing-Water to the inlets of saidimpeller passages, means for adjusting the valve longitudinally of theshaft to vary the quantity of throwing- Water delivered to the impeller,and a directingniember surrounding the impeller through which thethrowing-Water and air nass.

7. In a centrifugal air pump, the combination of a shaft, an impelleronthe shaft having a ring provided With passages for throwing-Water, avalve for regulating the supply of throwing-Water Which surrounds theshaftT is movable longitudinally thereof and has a portion. arrangedWithin. the ring,l said valve having passages vthat conveythrowing-Water and deliver it from said portion to the inletsof thepassages Yinthe impeller, means for moving the valve longitu-v dinallyof the shaft to vary the quantity of throwing-water delivered to theimpeller without throttling the supply, and a directing membersurrounding lthe impeller through which the throwing-Water and air pass.v

In Witness whereof, I have hereunto set my hand this day of April-15,1911.L

GUSTAV PAGEL.

lVit'nesses' G. HOLDTMANN, M. B RooKMANN.

Gopea ei this patent may be obtained for ve cents Washington, D. C.

each, by addressing the Commissioner of Patenti,

